Programming Model
MOTOROLA
DMA Controller
13-19
13.4.3.1 Channel Source Address Register
Each of the channel source address registers contain the source address for the DMA cycle. The value of
the register remains unchanged throughout the DMA process. If the memory direction bit (MDIR) in the
channel control register (CCR) is clear (indicating a memory address increment), then the channel source
address register contains the starting address of the memory block. If MDIR is set (indicating a memory
address decrement), then the channel source address register contains the ending address of the memory
block.
SAR0
SAR1
SAR2
SAR3
SAR4
SAR5
SAR6
SAR7
SAR8
SAR9
SAR10
Channel 0 Source Address Register
Channel 1 Source Address Register
Channel 2 Source Address Register
Channel 3 Source Address Register
Channel 4 Source Address Register
Channel 5 Source Address Register
Channel 6 Source Address Register
Channel 7 Source Address Register
Channel 8 Source Address Register
Channel 9 Source Address Register
Channel 10 Source Address Register
Addr
0x00209080
0x002090C0
0x00209100
0x00209140
0x00209180
0x002091C0
0x00209200
0x00209240
0x00209280
0x002092C0
0x00209300
BIT
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
SA [31:16]
TYPE
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0x0000
BIT
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SA [15:2]
SA [1] SA [0]
TYPE
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
rw
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0x0000
Table 13-14. Channel Source Address Register Description
Name
Description
SA [31:2]
Bits 31–2
Source Address
—Contains the source address from where data is read during a DMA transfer.
SA [1], SA [0]
Bits 1–0
Source Address [1] and Source Address [0]
—To ensure that all addresses are word-aligned
these bits are set internally to 0. These bits will be read/write as any value if and only if running in
big endian and source mode set to FIFO. This is to allow FIFO to use offset address during big
endian mode.
Содержание DragonBall MC9328MX1
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